GB2465681B - Digital circuit arrangements for ambient noise-reduction - Google Patents

Digital circuit arrangements for ambient noise-reduction

Info

Publication number
GB2465681B
GB2465681B GB0920789A GB0920789A GB2465681B GB 2465681 B GB2465681 B GB 2465681B GB 0920789 A GB0920789 A GB 0920789A GB 0920789 A GB0920789 A GB 0920789A GB 2465681 B GB2465681 B GB 2465681B
Authority
GB
United Kingdom
Prior art keywords
reduction
digital circuit
ambient noise
circuit arrangements
arrangements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
GB0920789A
Other versions
GB0920789D0 (en
GB2465681A (en
Inventor
Richard Clemow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cirrus Logic International UK Ltd
Original Assignee
Wolfson Microelectronics PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GB1015103A priority Critical patent/GB2470680B/en
Priority to GB1015105A priority patent/GB2470681B/en
Priority to GB1015106A priority patent/GB2470682B/en
Priority to GB1015100A priority patent/GB2470679B/en
Priority to GB0920789A priority patent/GB2465681B/en
Application filed by Wolfson Microelectronics PLC filed Critical Wolfson Microelectronics PLC
Priority claimed from GB0804508A external-priority patent/GB2446966B/en
Publication of GB0920789D0 publication Critical patent/GB0920789D0/en
Publication of GB2465681A publication Critical patent/GB2465681A/en
Application granted granted Critical
Publication of GB2465681B publication Critical patent/GB2465681B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17885—General system configurations additionally using a desired external signal, e.g. pass-through audio such as music or speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17853—Methods, e.g. algorithms; Devices of the filter
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1785—Methods, e.g. algorithms; Devices
    • G10K11/17855—Methods, e.g. algorithms; Devices for improving speed or power requirements
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
    • G10K11/1787—General system configurations
    • G10K11/17875—General system configurations using an error signal without a reference signal, e.g. pure feedback

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
GB0920789A 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction Active GB2465681B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB1015105A GB2470681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015106A GB2470682B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015100A GB2470679B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB0920789A GB2465681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB1015103A GB2470680B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0804508A GB2446966B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction
GB0920789A GB2465681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Publications (3)

Publication Number Publication Date
GB0920789D0 GB0920789D0 (en) 2010-01-13
GB2465681A GB2465681A (en) 2010-06-02
GB2465681B true GB2465681B (en) 2010-12-15

Family

ID=41572772

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0920789A Active GB2465681B (en) 2006-04-12 2006-04-12 Digital circuit arrangements for ambient noise-reduction

Country Status (1)

Country Link
GB (1) GB2465681B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578212A2 (en) * 1992-07-07 1994-01-12 Sharp Kabushiki Kaisha Active control apparatus with an adaptive digital filter
WO1994007212A1 (en) * 1992-09-21 1994-03-31 Noise Cancellation Technologies, Inc. Sampled-data filter with low delay
DE19526098C1 (en) * 1995-07-18 1996-09-12 Stn Atlas Elektronik Gmbh Active sound-dampening equipment
EP1074971A2 (en) * 1995-07-03 2001-02-07 National Research Council Of Canada Digital feed-forward active noise control system
WO2003003789A2 (en) * 2001-06-26 2003-01-09 Sonic Innovations, Inc. Method and apparatus for minimizing latency in digital signal processing systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0578212A2 (en) * 1992-07-07 1994-01-12 Sharp Kabushiki Kaisha Active control apparatus with an adaptive digital filter
WO1994007212A1 (en) * 1992-09-21 1994-03-31 Noise Cancellation Technologies, Inc. Sampled-data filter with low delay
EP1074971A2 (en) * 1995-07-03 2001-02-07 National Research Council Of Canada Digital feed-forward active noise control system
DE19526098C1 (en) * 1995-07-18 1996-09-12 Stn Atlas Elektronik Gmbh Active sound-dampening equipment
WO2003003789A2 (en) * 2001-06-26 2003-01-09 Sonic Innovations, Inc. Method and apparatus for minimizing latency in digital signal processing systems

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Lin, L. and Aboulnasr, T., "Adaptive Signal Processing in Subbands Using Sigma-Delta Modulation Technique", IEEE International Conference of Acoustics, Speech and Signal Processing, 1994, Vol. 3, pp 169-172 *
Minogue et al, "Adaptively Cancelling Server Fan Noise: Principles and Experiments with a Short Duct and the AD73522 dspConverter", Analog Dialogue magazine, 2000, Vol. 34, pp 10-15 *

Also Published As

Publication number Publication date
GB0920789D0 (en) 2010-01-13
GB2465681A (en) 2010-06-02

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20150820 AND 20150826